Quadrophonia were a Dutch dance act formed by Olivier Abbeloos (also known as part of T99) and Lucien Foort in the late 1980s, with rap vocals on several of their tracks performed by Marvin D (A.K.A. Ripmaster). They had two top-40 hits in the United Kingdom. "Quadrophonia", which reached #14 in April 1991, followed by "The Wave Of The Future", which charted at #40 in July of the same year, as well as 3 other singles from around this time, "Find the Time (Part 1)"